Crossword challenge

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Across
  1. 4. Waste that harms oceans and land.
  2. 5. Animals and plants living in nature
  3. 7. Living things such as fish, plants, and animals.
  4. 9. The process of using things again
  5. 10. Natural home of an organism
  6. 11. Tiny plants in the ocean that produce oxygen
Down
  1. 1. Using resources wisely to protect the future
  2. 2. Keeping nature safe and healthy
  3. 3. The Earth's air, water, and land together
  4. 6. give the answer in the crossword
  5. 8. The largest body of salt water on Earth.